Effective, and immediate after injection, basically do not need a recovery period. But there is a duration, and it will return to its original shape after basic absorption, which needs to be supplemented all the time. Residues that cannot be absorbed can never be cleaned. The more you hit, the more residue you have, and your face will be uneven in the future. Trade your old look for a new one in exchange for your youthful beauty of 10, and you can weigh it yourself.